Which element is the primary fuel used to generate electricity using nuclear energy? coal hydrogen uranium helium

Uranium

Explanation:

To generate electricity from nuclear energy in nuclear power plants, Uranium is the primary fuel which is used. This is not burnt rather Uranium atoms under go fission process that is the atoms of Uranium split into smaller nuclei to produce large amount of energy which is harnessed to produce electricity in nuclear power plants.

the total distance traveled by the car is

30km + 49km = 79 km .

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide